Volume 67, Number 4, August 2004
|Page(s)||662 - 668|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 August 2004|
Measurement of the coalescence frequency in surfactant-stabilized concentrated emulsions
Centre de Recherche Paul Pascal Av. Schweitzer, 33600 Pessac, France
2 Laboratoire des Milieux Dispersés Alimentaires, ISTAB Av. des facultés, 33405 Talence, France
Accepted: 4 June 2004
We produce different oil-in-water concentrated emulsions stabilized by surfactants and we follow their kinetic evolution. We get evidence that the size evolution is first determined by Ostwald ripening and then by coalescence. The crossover between the two regimes occurs at a well-defined droplet diameter that characterizes the surfactant monolayer. We exploit this general type of evolution to measure the characteristic coalescence frequency in the thin liquid films.
PACS: 82.70.Dd – Colloids / 82.70.Kj – Emulsions and suspensions / 68.15.+e – Liquid thin films
© EDP Sciences, 2004
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